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rITE ilV SA'IES PATENT OFFICE.

FRANCIS S. COBURN, OF IPSVICH, MASSACHUSETTS, ASSIGNOR TO XV. V.MESSERfOF BOSTON, MASSACHUSETTS, AND GEO. F. GRAY, OF ALBANY, NEW YORK.

HAND PRIN THING-PRESS.

Specicaton of Letters Patent No. 16,861, dated March 17, 1857.

To all 'Lv/wm t may concern.'

Be it known that I, FRANCIS S. COBURN, of Ipswich, in the county ofEssex and State of Massachusetts, have invented an Improved Hand-Stampgand I do hereby declare that the same is fully described and representedin the following specification and the accompanying drawings, of which-Figure 1 denotes a front elevation of my improved machine or stamp. Fig.2, a side elevation of it. Fig. 3, is a side view of the lever, K, to behereinafter described.

My invention is an improvement on that patented April 1st,.A. D. 1836,by Nathan Ames, of Saugus, in the State aforesaid; and I wish it to bedistinctly understood, that I lay no claim to the principle claimed bysaid Ames, or in other words any combination with the frame of the stampand its vertical shaft of any device or arrangement of devices by whichthe type or printing surface shall be inked and the impression producedby and during one downward motion of the hand or power applied to theperpendicular shaft to impel such downward toward'thebed. In the saidAmes machine, the inking roller during its downward motion, is forceddownward by the pressure of the type, acting directly against it, and ismaintained against the type by a spring connected to the frame and anarm carrying the inking roller. The pressure of the roller against thetype while rolling across it is continually increased, and is thegreatest when the roller is leaving the type. The consequence is thatthe ink is unequally distributed on the surface of the type, and byreason of the roller running up and stopping against the rear side ofthe type holder or block, such side becomes daubed or covered with ink,which is' liable to run down and injure or deface the impression -orpaper on the bed, or be productive of other evil effects.

The obj ect of my invention is to arrest the inking roller after thetype has been inked by it and during the further vertical movement ofthe type by a contrivance or means separate from the type block, so thatsaid inking roller may not roll against either vertical edge of the typebock and ink the same.

In the drawings A denotes the frame of the hand stamp.

B, is the stamp block or platen; C, the vertcial shaft or slide of thesame; D, the bed, and F, the arm carrying the inking roller G. rIheshaft, C, slides longitudinally in the frame and has springs, H, H,applied to it for the purpose of elevating it, after each downwardmovement of it.

In carrying out my improvement, I apply the arm, F, and the spring, I,of the inking roller to a bent lever K, arranged as shown in Fig. 2, andmade to turn upon a fulcrum, L, extended from the upper part of theframe. The arm, F, is ointed to the lever so as to play in a verticalplane, the spring, I, being connected at one of its ends to the arm andat the other to the lever and arranged as shown in Fig. 2. The upper armof the lever is bifurcated or formed as shown in Fig. 3, one prong ofits forked end being shorter than the other, as shown in the saidfigure.

A stud, a, extended from the shaft, C, enters the fork of the lever, K,and by its action therein during the up and down vertical movements ofthe shaft, C, it produces such vibratory movement of the lever, K, as tocause the inking roller to be moved underneath and across the typeprojecting from the under surface of the block B, the roller after theshaft has risen to its highest position, being estopped from unecessaryelevation by its spring, by means of the arm F, bringing up against astop or stud, Zi, extended from the lower arm of the lever, K. Themovements of the inking roller across the type are not produced by thedirect pressure of the type against it but by a separate power ordevice. Consequently, the pres sure of the spring of the inking rolleris nearly, if not exactly alike on all parts of the surface to be inked,while such roller is in the act of passing against the same.

As the inking roller leaves the rear edge of the printing surface, itcomes underneath and against a rest or projection M, arranged andextended from the frame as shown in Fig. 2, such rest serving to stopthe roller and prevent it from being thrown upward and directly over theprinting block by its spring during the further descent of the printingblock toward the bed.

My improvement renders unnecessary any finger extended from the rollerarm and for the purpose of holding the paper down,

or preventing it from rising up against and being soiled by a lip oredge of the printing block, When an impression is being given.

I do not claim combining the inking roller arm, F, and its spring, I,With the lever, K, applied to the frame, A, and the vertical Shaft, C,and operated by the latter substantially as described, but

I claim- The application or arrangement of the .st-ops M, and, and thespring I with respect to the frame, A., and the lever, K, and so as toarrest the upward movement of the roller under circumstances as stated.

In testimony whereof I have hereunto set .i5 my signature this twentiethday of October, A. D. 1856.

r. s. coBURN.

Witnesses R. H. EDDY, i F. P. HALE, Jr.

